Implement for cutting shaped sections from glass sheets.



PATENTED MAR. 17

, c. F. GHAPMAN. IMPLEMENT FOR CUTTING SHAPED SECTIONS FROM GLASS SHEETS.

APPLIOATION FILED JUNE 24. 1907.

2 SHEETS-SHEET 1.

NVENTOR.

' WIT ESSE No. 881,899. PATENTED MAR. 17, 1908. G. P. CHAPMAN.

IMPLEMENT FOR CUTTING SHAPED SECTIONS PROM GLASS SHEETS.

APPLICATION FILED JQNE 24. 1907.

2 SHEETS-SHEET 2.

74426666660. I Kaela for.- 0 1. @w. w 9344 4 cH nL 's- CHAPMAN, OF PHILADELPHIA, PENNsYLvANI-A, ASSIGNOR HOTALING 1 MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OEDELAWARE.

Specification of Letters Patent. Y

Patented March 17, 1908.

Application filed June 24, 1907. Serial No. 380,503.

lb all zbhom; may cone-em: Be it known that 1, CHARLES F. CHAPMAN,

I a citizen ofthe United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Im lements for Cutting Sha ed Sections from G ass Sheets, of which e. A further object of the invention is an impleme'nt operable to sever and remove from a sheet of glass a section of circular, elliptical or irregular outline, leaving the glass sheet unbroken and intact, except for the detachment of said section. 4

Heretofore, so, far as I am aware, implements of this character have not attained perfection in operation because the diamond would, in some part of the cutting of the outline, skip, so that the severed edges ofthe detached section and sheet of glass would have at one .or more points of severance, points, fins, spurs or splinters, necessitating the dressing or grinding of the edges, especially if the disk or section cut out related to steam or other pressure gages, which is expensive, both as regards time in delivering goods, and the cost of skilled labor.

By my invention 1 have overcome the objections here noted, as by implements made in accordance with my invention now in practical use, a disk, section or part may be cut and removed from a sheet of glass, leaving the'sheet intact or unbroken, except for the removal of said section, and the hne of cleavage between said section and the sheet having the edges of both clean out, not re quiring grinding for fine work. This is of importance not only with the cutting of lenses and the like, but with the removal of a section in ornamental glass work and in the fitting of ventilators, when the tapping of the glass to cause a severance of the partsde-- ed by the outline of the diamond is liable to cause cracks in the sheet to be used in a section of circular, elliptical or irregular out-.

window, thus destroying the sheet, and wasting the work put upon it to that point.

My invention comprises an implement which in practical use avoids the objections hereinbefore noted, and consists in novel details of construction, and combinations to be described hereinafter in detail, and claimed in the closing clauses of this specification. In the accompanying drawings, Figure 1 is a side elevation, of one form of device embodying my invention, the top of the standard being broken away. Fig. 2 is a plan view thereof, partly in section. Fig. .3 is a perspective view thereof. Fig. 4 is a vertical section through the base of the standard and the suction disk. Fig. 5 is a detail, partly in section, of the lower end of the tool shank and tool. Fig. 6 is a bottom, plan view of the tool'on a large scale. Fig. 7 is a detail, partly in section, showing the upper end of the standard and the operating rod and nut. Fig. 8 is a detail showing the ball pointed pin in section. Figs. 9, 10, and 11 are top plan views of some of the templets, that have been successfully used.

Referring to the drawings, a standard D rises from an arched or dome shaped base H, and mounted to move freely about said standard without lost motion, is a sleeve 0 carrying a graduated arm 0', carrying a telescopic sleeve C on which is adjustably mounted a tool-carrying slide 1, having a threaded boss I to receive a thumb-screw I by which the slide may be locked to the sleeve 0 at a desired point. This slide is also provided with a boss i having a vertical aperture to receive the shank L of the cutting tool, said shank being adjustably Securedwithin the aperture by a thumb-screw '11, as shown.

As shown in Fig. 4, the standard is hollow throughout its length, and incloses a rod B passing through and secured at the radial center of a somewhat-heavy rubber disk or diaphragm G of a diameter to be snugly seated withinthe down-curved margin h of the arched or domed base H. As shown in Fig. 4, the lower end of the rod B is reduced in diameter and passes through a central boss 9 of the suction disk or diaphragm G, and is further reduced at the extreme end to receive a thin steel washer g which is rigidly secured to the rod by upsetting or swaging the reduced end of'the rod upon the washer,-

the parts being so proportioned that the washer will be embedded in the lower face of the disk in order that the latter may lie flat, or substantially so, upon a plane surface S, as, for instance, a sheet of glass.

The upper end ofthe rod is provided wlth a double thread B or a thread of rapid pltch, engaging which is a thumb-nut A, by means of which the diaphragm G maybe drawn upward at the center, thereby causing suiticient vacuum between the diaphragm and sheet of glass S tocause an adherence between the fiat rim of the diaphragm and the glass,-req.uiring great force tose'parate these arts. p A preferred form of cutter is shown in Figs. 5 & 6, comprising tool stock J formed of a small rod of brass provided at the lower end with a diamond K, and provided between its ends with a more or less wide transverse sawkerf or slot 1', said tool-stock being inserted in a socket Mf the lower end of the toolshank, and a coiled spring m being interposed between the end of the to0l-st0ck and bottom of the socket to exert-a yielding cutting pressure upon the diamond. To suc-' cessfully operate adevice of this character, it is necessary that the lens or section cut and detached from the sheet, should have a greater diameter of severance on top or toward the tool, or, in other words, that the cleavage between the detached section and the sheet shall be at aslight bevel or angle from the top of the sheet of glass on which the tool is anchored, inward with respect to the line of the out toward the center of the section of glass to be removed. This I accomplish with the preferred form of the cutter shown in Figs. 5 & 6, which is designed to represent a diamond point dressed to form cross sectionally, an isosceles triangle a longer edge being designed to face the standard, the tool-stock J being swivelingly seated in the socket at the lower end of the toolshank, and a screw 7" passing through a tapped hole in the shank and entering the kerf of the stock, thus permitting. limited axial movement of the stock, as also a limited vertical movement thereof, under pressure of the spring M due to' the kerf 7' being somewhat wider than the diameter of the screw,

limiting its vertical movement.

As so far described, the implement is limited to cutting circles and arcs, it will be understood that it is adapted to cutting sections of elliptical, oval or irregular form, ac-

cording to the templet used. This, in the form shown, is accomplished by providing a pattern or templet F to be mounted on the standard beneath the tool-shank carrying arm 0, and having a guide groove or way F in its upper face to be engaged by a ball pointed swivel-pin D depending froma sleeve 0 mounted for free longitudinal the point of t e thumb-screw movement on arm 0 but held from rotation thereon by a longitudinal groove C in the arm being engaged by a co-acting part carriedby sleeve G which may be a feather, or one or more studs passed through the walls of the sleeve and entering the groove of the arm. In this instance, the tool carrying sleeveI will be mounted adjustably on the sleeve C thelatter being provided with a longitudinal roove D for engagement of to prevent rotation of the sleeve I on sleeve C v It will be noted that the disk or diaphragm Gis substantially fiat throu hout its diameter, its flat'continuity being roken or interrupted'by moldin'g the disk to form a downwardly facin channel G concentric with the periphery o permits of the upward fiexture of that art of the disk within the channel by the yielding of the walls of the arch defining the chanme the disk. This construction without disturbing the close contact of supported by the disk slightly above the.

glass, but upon turning the thumb-screw A to flex the disk upward at its center, the margin of the base will be moved nearer to the glass.

It will be understood that the implement though fitted with a templet F and the slid ing sleeve C, .may be used for cutting circles, by first reversing the set-screw G of the keeper collar G, then raising the ball pointed swivel pin D free from the guide groove of thetemplet, then sliding the sleeve 0 outward until said pin is beyond the greatest diameter of the templet, then clamping said sleeve 0 to arm 0 by means of the setrscrew c and finally adjusting the tool-carrying slide to the desired position and looking it by means of screw 1 Both arm C and C are provided with the scale as shown.

While, in the foregoing description I have assumed that the instrument is standing on a'horizontal base, it will be understoodthat it may be operated in any other position, as, for instance, to cut a circular or irregular section from a pane of glass in a vertical sash, to admit of attaching a ventilator, or for ornamental purposes.

I claim:

'1. An implement for cutting shaped sections from glass sheets, comprislng an arched base, a substantially flat diaphragm therein, an arm mounted to move about the base as a center and ada ted to carry a diamond, a rod rising from tl ie center of the diaphragm through the'base, and means to cause regulated upward movement of the rod.

2. An implement for cutting shaped secrising an arched base, a hollow standard rising therefrom, an arm secured to move about the standard as a center and carrying a diamond, a flat dia- 5 phra within the base having an outwar y facing channel concentric with the periphery thereof, a rodrising from the cen ter of the base through the standard, and means to cause regulated upward movement of the rod.

3. An im tions from g ass sheets comprising an arched base, a hollow standard rising therefrom, an

arm swiveled upon the standard and supporting a sliding sleeve carrying a tool support and tool, a grooved tem let secured beneath the arm, a stud carrie by the sliding sleeve engaging said groove, a flat diaphragm within the base, a rod secured cen- 20 trally thereto and rising through the stand:

tions from glass sheets comp lement for cutting shaped sec-' shaped secmovement in the shank and fitted with a diamond having a triangular face, the longer cutting edge of whichis normally maintained facing the standard.

CHARLES F. CHAPMAN. 

